At 40, Liv Tyler has said goodbye to her New York West Village hipster lifestyle and replaced it with London’s Notting Hill, toddlers, a new fiancé and a stack of TV projects. Annabel Meggeson meets the actress as she embarks on new adventures.

On the hottest day of the year, Liv Tyler is standing outside, encased in an enormous woolly jumper and wellington boots. “Oh my god!” laughs the actress, fanning the front of her jumper, unsticking the hair from her face. Moments later, she meanders back inside the house where we’re shooting for an outfit change, stops to photograph a giant Kilner jar she likes the look of and grab a handful of grapes. The assistant who accompanied her to the shoot this morning is long gone and, even when Tyler gets engrossed in a chat with the crew and has to be chivvied along for the next shot by our stylist, do you think she minds? Not in the least.

I’ve interviewed Liv Tyler twice before, most recently about five years ago. It was through the contract she once held as a face of Givenchy, but there hadn’t been a film for a while and she was still the iconic ingénue with a rock ’n’ roll edge: Tyler is the daughter of Aerosmith frontman Steven Tyler and star of coming of age movies Stealing Beauty,That Thing You Do! and Empire Records. There’s been the odd blockbuster, too, notably Armageddon and The Lord of the Rings trilogy. She was the same sweetly bohemian spirit when we last spoke, but today there’s an assuredness that makes her all the more engaging; a tangible sense that she’s… all grown up.

Her guileless, easy-going attitude is all the more commendable given Tyler has a kidney infection. “The first time ever in my life, it’s so weird,” she muses. Is it, though? From what I can tell, Tyler has never had so much on her plate.

She’s in the process of moving house with her fiancé Dave Gardner – after flitting between New York and London for two years, the couple moved permanently to London in August last year – and is mother to their two kids; Sailor Gene, two, and Lula Rose, one (Tyler and Gardner also have custody of their sons from previous marriages, British rocker Royston Langdon and actress-heiress Davinia Taylor respectively. Tyler’s son Milo is 12, Gardner’s Grey is 10). There’s also been a hefty resurgence in Tyler's career. In 2014 she was cast as Meg in acclaimed drama The Leftovers, co-starring Justin Theroux, the third series of which is now showing on Sky Atlantic, and she’ll star in BBC’s period drama Gunpowder this November. “And I just went to Glastonbury,” she adds, apologetically.

With her suddenly swelled family, Tyler is thirsty for the ins and outs of parenting. Getting wind of my own four children prompts a delightful barrage of questions: “How do you do it? Did you have lots of help? What was your stomach like with triplets?” She treats me to titbits in turn, and is refreshingly open about the amount of help she has with the kids. “What do they say? It takes a village. With Milo I did it all on my own, but it’s impossible now there are so many of us now – six before the nannies. I have a live-in, because we both work and travel.”

The full interview with Liv Tyler appears in the October issue of Red, on sale 31st August.